Electric current rectifier cooling system



' Feb. 2, 1932. o. SEITZ 1,843,476

ELECTRIC CURRENT RECTIFIER COOLING SYSTEM Filed Jan. 5, 1927 PatentedFeb. 2, 1932 UNETED STATE-S PATENT OFFIQE OSKAR S EITZ, OF BAIDEN,SWITZERLAND, ASSIGNOR TO AKTIENGESELLSCHAFT BROWN BOvERI c CIR, OFBADEN, SWITZERLAND, A JOINT-STQCK COMPANY OF SWITZER- LAND ELECTRICCURRENT RECTIFIER COOLING SYSTEM Application filed January 3, 1927,Serial No. 158,720, and in Germany January 11, 1926.

, be eifecte d conveniently by continuous flow from the service line.However, in many instances a suitable water supply is not available, as,for example, in the case of isolated substations, or in instances wherethe water of the service supply carries minerals or foreign matter whichmay be detrimental to the apparatus.

The general objectof the present lnvention is the provision of anapparatus whereby the rectifier may be cooled by circulation andrecirculation of a: cooling medium in a closed system which constitutesan adjunct of the rectifier itself.

A particular object of the invention is the provision of such anapparatus which forms a unitary installation and occupies but littlespace, sothat the entire apparatus may be installed in approximately thesame floor space. required by the rectifier alone.

Another object is the provision of an apparatus which will serveconjoint-ly the portions of the apparatus included in the circulatingsystem and those which are equipped individually with separate coolingdevices.

Still another object is the provision of an apparatus wherein therectifier is cooled by both air and water circulation.

Other and further objects will be pointed out or indicated hereinafteror will be obvious to one skilled in the a-rt upon an understandingof-the invention or' its employment in practice.

In the drawing forming a part of this specification, I illustrate onestructural embodiment of the invention, but it is to be understood thatthis is presented for purpose of illustration only and is not to beaccorded any interpretation calculated to limit the claims short of thetrue and mostcomprehensive scope of the nvention 111 the art.

In the drawings,

Fig. 1 represents an elevational view of a rectifier including itscooling elements, parts being shown in sectional elevation onsubstantially line 11 of F ig. 2; and

Fig. 2 is a top view of the installation with the hood and aircirculating fan removed.

The nature of the invention may be most quickly ascertained by referenceimmediately to this illustrative construction. As shown in the drawings,let it be understood that the reference numeral designates the rectifiercylinder or operating casing having the cathode basin 12, the anodeplate 14- and the condensing dome 15. A plurality of anode holders 16are mounted on the anode or top plate 14 and support the anodes withinthe cylinder 10. The cylinder 10 and condensing dome are formed withwater jackets 11 and 13 respectively, and the cathode basin 12 and anodeplate 14 with channels 17 and 18 respectively for circulation of coolingfluid. The water channels 18 of the anode plate communicate with thewater space of the acket 13, and also, by way of the pipe 19, with thewater space of the cylinder jacket 11. The water space of the cylinderjacket 11 likewise communicates with the channel 17 of the cathode basinby way of a pipe 20. The

anodes are provided with individual cooling radiators 21 for containinga cooling liquid, each of said radiators serving its respective anode bygravity circulation, and having the air circulation tubes 21. Betweenthe anode radiators 21 are disposed the circulation radiators 22 whichhave communication with the upper portion of the water jacket of thecondensing dome 15 and with a header ring 24. A pump 25, driven by amotor 26, has an inlet pipe 27 leading from the header ring 24. and hasits outlet connected with the cathode water jacket by a pipe 28. Thewater jackets and the circulation radiators 22 are filled with asuitable cooling medium such as water, which is circulated by the pumpfirst to the cathode jacketl'r', then by Way of pipe 20 to the cylinderjacket 11., thence by pipe 19 to the water channels 18 of the anodeplate 14, thence to the water jacket 13 of the condensing dome, thenceinto the circulation radiators 22, and from them to the header ring 24and back to the pump inlet through ipe 27. A hood 29 is common to andreceives and is arranged in covering relationship to the radiators 21and 22 and the condensing dome, and is supported, as shown, above thetopplate 1a with its lower edge portion in spaced relation with respectto the adjacent edge portion of the plate to provide an inlet passage31' for cooling airf A fan 30,'supported at the upper outlet end of thehood,

operates to draw the relatively cool exterior air inwardly through inletpassage 31, as indicated by the arrows shown, and to efi'ect upward howof: the cooling air through" hood 29 and over the cooling surfacesprovided by the anode-cooling means or radiators 21 and the radiatorelements'22. By operation of the fan a circulationotair-is maintainedover the exposed snrfaces'ofthe rectifier cylinder,anode plate andcondensingdome, and

' through the air tubes 21 of the anode radiators and over the surfacesofthe circulation radiators 22, for the purpose. ofcarrying away heatfrom cu'lation of the cooling liquid in the circu'latingsystem displacesthe heated liquid fronr the water Ji'ClifitldlIltO radiators 22, whereinitis cooledby the air circulation betore' passing to the inlet ofthepump 25. v

, The apparatus thus provides a self contained installation adapted foroperation independently of anexternal source of cooling liquid supply;The arrangement illustrated is attended with particular advantage byvirtue of the fact that' the' entire apparatus requires no more floorarea than does the rectifier alone, and that all of the cooling surfacesare served conjointly by thesame air circulating device."

' hat-I claiui is:

1. The combination with a rectifier having a water-jacketed portion andan anode holder, of a radiator serving the anode holder, a radiatingdevice communicating with the watenjacketed portion, a pump forcirculating cooling liquid through the waterjacketed portion andradiating device, and an air-circulating device for moving air incontact with the radiator, the'water-j acketed portion and the radiatingdevice.

2. The combination wlth a rectifier having a water-jacketed portion anda plurality of;

the metal surfaces and the contained cooling liquid. The forced ciranodes, of radiating devices communicating with the water-jacketedportion and arranged intermediate the anodes, radiators associated withrespective anodes, a hood enveloping the radiators and radiatingdevices, and means for; passing air through the hood.

4. The combination with a rectifier including the rectifier casing and awaterjacketed condensing dome surmounting the 1 same, of radiatingdevices having communication with-the dome water-jacket-anddistributedabout the same over said casing, and a pump-having. inlet connectionwith the radiating devices and outlet connection with the domewater-jacket.

5. The combination with a rectifier having a cover plate and awater-jacketed condensing dome supported thereon, of radiating devicescommunicating with the dome waterjaclret and supported on the coverplate, and means for circulating cooling liquid through the saidwater-jacketandradiating devices.

6.111 rectifying apparatus, an operating casing having a top plate,anode-cooling means supported above said plate, means providing passagesfor cooling liquid disposed in such manner as to render such liquidefi'ective witlrrespect to said casing, said last-named means includingan air-cooled radiator elementsupported above said plate,

and means common to: said anode-cooling means and said radiator elementfor effecting flow of coolmgair over the same.

7 In rectifylng apparatus, an operat ng casing having a top a plate,anode-coohng mea-ns supported above said plate, means providing passagesfor cooling liquid dis- 7 posed in such manner as to render such liquideffective with respect to said casing, said last-named means includingan air-cooled radiatorelement supported'above said plate, and meanscommon to said anode-cooling means andsaid radiator element foreiiecting flow of cooling air over the same and comprising avertically-disposed hood common to and receiving, said anode-coolingmeans and said radiator element and supported with its lower edgeportion in spaced relation with respect to the adjacent-edge portion ofsaidplate to provide an air-inlet passage, and means operable to induceair flow into said hood by way of said air-inlet passage. 7 V I Intestimony whereof I- have hereunto subscribed my name this 14 day ofDecember, A. D. 1926, at Zurich, Switzerland.

v r I OSKAR SEITZ.

